general editors Michael Orme, Susanna Graham-Jones
Penguin Group, 1989
Buku Referensi
Bansal, H.L.
B. Jain Publisher, 1989
Buku Teks
Clinard, Marshall B. (Marshall Barron)
Tree Press, 1966
Buku Teks
French, F. G.
Oxford University Press, 1947
Buku Teks
King, Vex
Bluebird, 2022
Buku Teks